Joseph herrburger



(No Model.)

J. HERRBURGER.

PIANO ACTION.

No. 520,989. Patented June 5, 1894.

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UNITED. STATES PATENT Brion.

JOSEPH HERRBURGER, OF PARIS, FRANCE.

PIANO-ACTION.

SPECIFICATION forming part of Letters Patent No. 520,989, dated June 5, 1894.

Application filed April 4, 1894. Serial No. 506,249- (No model.)

To aZZ whom it may concern.-

Be it known that I, JOSEPH HERRBURGER, of Paris, France, have invented an Improved Piano-Action, of which the following is a specification.

This invention relates to animproved action for grand pianos and more particularly to an improved construction of the spring and of the finger which operates the hammer.

In the accompanying drawings: Figure 1 is a side elevation of my improved piano action; Fig. 2 a top view of the repeating lever and finger, and Fig. 3 a bottom view of the repeating lever.

Heretofore it has been the general practice.

to attach the spring in grand actions to the rider flange f. The objections to this construotion are that the spring during use produces a friction against the repeating lever Z, and also that the tension of the spring is re ulated with difficulty. I propose to attach the spring 0', not to the rider flange at all, but directly to the repeating lever. To this effect the repeating lever is provided with a pair of downwardly depending flanges or checks 5, between which a slot is formed. This slot is bridged by a pin m, aroundrwhich the spring 0", is bent. From this pin the spring extends directly to the j aok, it being coiled preferably as at r, in order to obtain greater elasticity. The spring operates upon the jack 6, with its lower end, while with its upper end it operates upon the lever Z. Owing however to the fact that the spring is fastened directly to the lever, the pressure on the latter is produced without the least friction. Through the lever Z extends the regulating screw 1;, that bears upon the spring and by which the tension of the spring may be readily adjusted. With actions that use a pivoted finger above the repeating lever, to transmit motion to the hammer shank, it has been the custom to pivot such finger to the rider flange. I propose to pivot the finger, not to the rider flange, but to the repeating lever. To this eifect the lever Z is provided with a perforated projection n, that enters a slot n of the finger p, and is connected thereto by a pivot 91 The advantage connected with this construction is that I avoid any friction arising from any difference of motion between the repeating lever and the finger.

What I claim is- 1. A grand piano action provided with a bent spring,.whioh is fastened to the repeating lever andextends directly from said lever to the jack, substantially as specified.

2. A grand piano action provided with a slotted repeating lever, a regulating screw ongaging the same, and a bent spring which is fastened to the repeating lever and extends directly from said lever to the jack, substantially as specified.

3. A grand piano action provided with a repeating lever and with a finger pivoted directly to said lever and adapted to engage the hammer-shank, substantially as specified.

4. A grand piano action provided with a repeating lever having an upwardly extending projection, and with a slotted finger pivoted to said projection and adapted to engage the hammer-shank, substantially as specified.

JOSEPH I-IERRBURGER.

WVitnesses:

VUIGNOT, H. Veer. 

